Use HttpClient instead of DefaultHttpClient, which cannot be mocked
Simplify the JettyServer code by deleting the startServer method
Check if the gotten current connection is null in order the tests work
Add unit tests for all the backends, the Jetty server and the management interface
Add tests for CKANBackend
Merge pull request #202 from telefonicaid/hardening/add_tests

hardening/add tests